Sunlight promoted palladium catalysed Mizoroki–Heck, Suzuki–Miyaura and Sonogashira reactions

The palladium catalysed Mizoroki–Heck, Suzuki–Miyaura and Sonogashira reactions were successfully carried out under irradiation with sunlight. The Heck reaction gives considerable amount of Z product due to photochemical isomerization of initially formed E alkenes. Reaction of methyl 2-iodobenzoate with acrylamide under solar condition furnished 2H-2-benzazepine-1,3-dione rather than the expected derivative of cinnamate while the same reaction with ethyl 2-iodobenzoate gave the desired cinnamide.